/*
 * Copyright 2012-2018 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package cn.springcloud.gray.bean.properties;

import org.springframework.beans.factory.BeanCreationException;
import org.springframework.util.ClassUtils;

/**
 * Exception thrown when {@link ConfigurationProperties @ConfigurationProperties} binding
 * fails.
 *
 * @author Phillip Webb
 * @author Stephane Nicoll
 * @since 2.0.0
 */
public class ConfigurationPropertiesBindException extends BeanCreationException {

    private final Class<?> beanType;

    private final ConfigurationProperties annotation;

    ConfigurationPropertiesBindException(String beanName, Object bean,
                                         ConfigurationProperties annotation, Exception cause) {
        super(beanName, getMessage(bean, annotation), cause);
        this.beanType = bean.getClass();
        this.annotation = annotation;
    }

    /**
     * Return the bean type that was being bound.
     *
     * @return the bean type
     */
    public Class<?> getBeanType() {
        return this.beanType;
    }

    /**
     * Return the configuration properties annotation that triggered the binding.
     *
     * @return the configuration properties annotation
     */
    public ConfigurationProperties getAnnotation() {
        return this.annotation;
    }

    private static String getMessage(Object bean, ConfigurationProperties annotation) {
        StringBuilder message = new StringBuilder();
        message.append("Could not bind properties to '"
                + ClassUtils.getShortName(bean.getClass()) + "' : ");
        message.append("prefix=").append(annotation.prefix());
        message.append(", ignoreInvalidFields=").append(annotation.ignoreInvalidFields());
        message.append(", ignoreUnknownFields=").append(annotation.ignoreUnknownFields());
        return message.toString();
    }

}
